Table 5.

Lower and upper limits for optimization design variables

Bearing number	Design variables
	$D_m$(mm)		$D_r$(mm)		$l_e$		$Z$		$K_{D_{\mathit{min}}}$		$K_{D_{\mathit{max}}}$		$\epsilon$		$e$		$\beta$
	L.L	U.L	L.L	U.L	L.L	U.L	L.L	U.L	L.L	U.L	L.L	U.L	L.L	U.L	L.L	U.L	L.L	UL
30204	22	45	1.5452	11.8003	1.5452	10.7741	5	91	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
30205	27	50	1.6390	11.5	1.6390	11.8539	7	95	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
32205	27	50	1.8028	11.5	1.8028	14.4848	7	87	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
322/28	30	56	1.9435	13	1.9435	15.4870	7	90	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
32206	32	60	2.0903	14	2.0903	15.9770	7	90	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
30207	38	69	2.1132	15.5	2.1132	13.4001	7	102	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
30306	33	69	2.2023	18	2.2023	14.4075	5	98	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
32207	38	69	2.3992	15.5	2.3992	17.5231	7	90	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
30307	39	77	2.4967	19	2.4967	16.0424	6	96	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95
32208	43	77	2.5541	17	2.5541	17.5231	7	94	0.3	0.4	0.5	0.6	0.4	0.5	0.01	0.07	0.80	0.95